Ether2Any and PyTap
===================
Ether2Any is a python baseclass for writing arbitrary Ethernet/IP tunnel using
a TUN/TAP device.

PyTap is a python class for handling a TUN/TAP device. It exposes read/write
and abstracts a bit of the network configuration.

Installation and requirements
=============================

Just put it somewhere and import it. For PyTaps network configuration
functions you need /sbin/ifconfig.


How to write an Ethernet/IP tunnel
==================================
Writing a tunnel with this is rather easy. All you have to do create a class
inheriting from Ether2Any and implement the method sendToNet(). sendToNet()
will be called for each incoming network packet. If you add extra sockets
to the select loop via addSocket, sendToDev() needs to be implemented,
which gets the socket on which new data is ready. If you don't want to rely
on select you are free to pass self.dev (which is a PyTap() instance) and
call dev.write() whenever you like. Note that if you write invalid network
packets on it, you might get an exception.

Afterwards you can instanciate your class and call the run() method to start
your tunnel.


What could be done
==================
 * At the beginning of each packet there are 
 * Builtin packet aggregation would be nice
 * Various FIXMEs/TODOs
 * Replace ifconfig with the ip utility
 * Add plugin architecture to pytap for traffic mangling
 * setuptools/pypi dance